body {
  max-width: 540px;
  min-width: 320px;
  margin: 0 auto;
  font: normal 14px/1.5 Tahoma, "Lucida Grande", Verdana, "Microsoft Yahei",
    STXihei, hei;
  color: #000;
  background: #f2f2f2;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

div {
  box-sizing: border-box;
}

/* goBack */
.goBack {
  display: none;
  position: fixed;
  bottom: 150px;
  right: 20px;
  width: 38px;
  height: 38px;
  background: url(../upload/back.png) no-repeat;
  background-size: 38px 38px;
}

/* focus */

.focus {
  position: relative;
  /* 溢出隐藏 */
  overflow: hidden;
}

/* .focus img {
  width: 100%;
} */

.focus ul {
  /* 清除浮动 */
  overflow: hidden;
  /* 装 5 张图片 */
  width: 500%;
  /* 移动后，显示第一张图片 */
  margin-left: -100%;
}

.focus ul li {
  /* 横向浮动 */
  float: left;
  /* 5张图片 */
  width: 20%;
  height: 150px;
  font-size: 100px;
  color: #fff;
  text-align: center;
  line-height: 150px;
}
.focus ul li:nth-child(1) {
  background-color: orange;
}
.focus ul li:nth-child(2) {
  background-color: brown;
}

.focus ul li:nth-child(3) {
  background-color: greenyellow;
}

.focus ul li:nth-child(4) {
  background-color: orange;
}
.focus ul li:nth-child(5) {
  background-color: brown;
}

.focus ol {
  position: absolute;
  bottom: 5px;
  right: 5px;
  /* 替换默认值 */
  margin: 0;
}

.focus ol li {
  /* 在一行显示 */
  display: inline-block;
  width: 5px;
  height: 5px;
  background-color: #fff;
  /* 去掉默认的圆点样式 */
  list-style: none;
  /* 圆角 */
  border-radius: 2px;
  /*  */
  transition: all 0.3s;
}

.focus ol li.current {
  width: 15px;
}
